Paper-moistening apparatus.



H A. URAIGIER PAPER MOISTENING APPARATUS.

APPLICATION FILED 13180.9, 1912 1 1%? 5? I Patented. Feb. 9,1915.

l/WTA/EESES UNITED STATES PATENT OFFICE.

HUGH A. CRAIGIE, or CUMBERLAND MILLS, MAINE, ASSIGNOR To s. in. WARREN a00., or BOSTON, MASSACHUSETTS, A PARTNERSHIP CONSIS'IING 0E FISKEWARREN, or HARVARD, MASSACHUSETTS, CHARLES w. WARD, or BEooKLINE,MASSACHUSETTS,

W. 13. NYE, OF NEWTON, MASSACHUSETTS, H. W. MASON, 0F IPSWVICI-I,MASSACHU- SETTS, R. D. SMITH, OF DEDHAM, MASSACHUSETTS, AND SAMUELWARREN, OF

BOSTON, MASSACHUSETTS.

PAPER-MOISTEN IN G- APPARATUS.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filedDecember 9, 1912. Serial No. 735,638.

' a specification.

his invention relates to paper making and has particular reference tothe dampening or remoistening of the paper web prior to its calendering..In passing throughthe paper making machine, there is a constanttendency to overdry the paper. For some time it has been known thatsuperior calendering results may be obtained by offsetting this normaloverdrying by moistening. In actual practice, however, this matter ofremoistening has proved to be a very difiicult matter. By careful tests,I have found that for most papers, calendering is accomplished inminimum time and with the best finish with between three'to five percent.

of water present in the paper. The percentage of water for differentgrades of stock and for diiferent finishes "aries therefore by rathersmall degrees of gradation. Under-moistening means a waste of time andfailure of result, while over-moistenin is apt to spoil the paperaltogether. An a solutely predetermined percenta e of moisture musttherefore be added to t e pa er, and this moisture should be appliedwith as nearly absolute uniformity of distribution as possible. Attemptshave been made to moisten the paper by 'spattering it with brushes, butthis system was defective, both in that the amount of moisture could notbe regulated, and that its distribution was not uniform.

By my present invention, I provide for absolute predetermined, uniformmoistening, and I accomplish this during the operation of reeling, thuseffecting an economy in the handling of the paper. By my invention, I amnot only able to secure exactly the desired finish, but I have beenable. to very considerably reduce the expense of the super-calenderingprocess. This economy is effected by shortening the process so that, forexample, I am enabled to calender certain papers in two runs, whereasheretofore at least three runs were necessary. This is not only a savingin time, permitting a greater output or a less number of machines inoperation, but it also saves one-third of that waste which occurs atevery step of the paper making process in which the paper is to berehandled.

' The construction and arrangement of the apparatus which I have devisedwill be more fully disclosed in the specification which follows. In thatspecification, and in the draw,- ings which form a part of it, I Willmake particular reference to one form of apparatus embodying theprinciples of my invention. I

It'will be understood that the apparatus may be modified for applicationto various types of paper making machinery.

In the drawings: Figure 1 is an end view of part of a paper makingmachine equipped with my improved moistening apparatus. Fig. 2is a sideelevation thereof. Fig. 3 is an enlarged view of the moisteningapparatus detached.

Referring'more particularly to the drawings in which like numerals ofreference denote corresponding parts in the several fig ures thereof,the numeral 1 designates the frame of a paper making machine of anydesired size or capacity from which rise bearing brackets 2 in which arejournaled the shafts of the cone pulleys 3 connected by a belt 4 anddriven by pulley 5, belt 5 and pulley 6, which receives power from anysuitable source. This rotation is transmitted by pulley 7 belt 7 andpulley 8 to the shaft 9 of the moistening roller 10 mounted thereon.This roller 10 is revolved Tn the liquid containing trough 11, whichtrough is of the shape best shown in Fig. 3 and has its upper portionbent to form a guiding and steadying member disposed in the path of thepaper web P. Water may be supplied to this trough in any suitablemanner, a constant and uniform level being maintained by means of a pipesupplying an excess, and an overflow orifice carrying ofl such excess.From this construction it will be noted that the moistening roller 10may be rotated at a predetermined speed by means of the va- Y of themoistening apparatus will be readily vriable speed pulleys 3. Thispermits the amount of moisture to be applied to the paper web to beaccurately regulated to conform with the requirements of the difierentgrades of paper.

The Web P of drying cylinders the paper is fed from the through thechilled iron rolls to the reels, (none of which are shown), and .passesover drums 12 and 13, and through thetrimming knives 14 and 15 to thedriving drum l6, and rider 17 (These are regular equipment on any papermachine, and form no part of my invention). The web P passes downwardlyagainst the moistening roller 1.0, which roller is rotated in adirection counter to the direction of feed of said web and passes uponthe winding drum 18 from whence it is removed and carried to thecalenders.

From the foregoing connection with the drawings, the operation i seen.It will be noted that the amount of moisture'applied to the paper may beregulated accurately by regulating the speed of rotation of themoistening roller 10 bymeans of the variable speed pulleys 3, or byregulating in any suitable manner the speed of the 'web of aper P. Thesteps in operation of the mac ine are thus reduced, as" the paper whenproperly moistened will description taken in take the required finishthrough the supercalender less times, thereby effecting a saving inpower and reducing the liability of breakage ofthe web by one.

I claim:

1. In combination with the delivery end of the paper driers of a papermaking machine, a moistening roll effectively disposed in the path ofthe paper when it leaves the driers and before it is finally reeled forealendering, and a water trough having a constant water level in whichsaid moistening roll rotates at predetermined speed and in reversedirection to the passage of the paper.

2. In combination with the delivery end of'the paper driers of a papermaking machine, a paper moistening. roll effectively disposed in thepath of the paper as it runs from the driers to the winding rolls, aliquid container in which said moistening roll rotates and having aconstant water level and formed with a guiding portion disposed in thepath of the paper feed prior to the contact of the paper with said roll.

In testimony whereof I aflix my signature in presence of two witnesses.

HUGH A. ORAIGIE.

Witnesses:

f BERTHA W. KNIGHT,

WILLIAM LYONS.

